The device is so different for different people. I tried really hard to use my VP as a MacBook display but sitting up in a chair with it on for more than 15 minutes is simply too uncomfortable: too heavy.

I only use it to watch movies, ALWAYS while lying down with my head on a pillow and my feet propped up on cushions. That way I'm able to position the device so as to distribute the weight evenly on my forehead/cheekbones. The revised strap enables the weight to be precisely distributed and altered as needed if it gets uncomfortable.